I've created this new topic for you so that you get individual help to recover access to your tiscali mailbox. I've also alerted the Community TalkTalk team. You'll have a response from a TalkTalk OCE (UK Support) in this thread. That'll be from Monday onwards.
In the meantime, please update your Community Profile Personal Information (Click here) to include your name, current contact 'phone numbers and address with postcode (location) then scroll down to Private notes and add the tiscali email address and Save changes.
A TalkTalk OCE will reply to this thread and Community Private Message you to verify the registered email user details:
When verified, the mailbox will be secured, Reset details set up and one of the TalkTalk team will call on your mobile to check security with you and let you know you can set your own password and check it works.
Do you know how the password came to be compromised? If not, secure your devices by carrying out virus and malware detection and removal before changing any password. Advice about choosing a new ultra-strong password is at getsafeonline.
I can see that Gondola has given you some good advice
I've sent you a PM to confirm some details, so that we can get your password changed